Quarterly report pursuant to Section 13 or 15(d)

Schedule of Related Party Transactions, by Related Party (Details)

v3.8.0.1
Schedule of Related Party Transactions, by Related Party (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Related Party Transaction [Line Items]      
Management fees $ 11,708 $ 9,808  
Equity securities, at fair value 27,423   $ 29,413
PRCM Advisers LLC [Member]      
Related Party Transaction [Line Items]      
Management fees $ 11,708 9,808  
Percent per annum of equity used to calculate management fees 1.50%    
Direct and allocated costs incurred by manager $ 6,791 4,227  
Compensation costs related to restricted common stock $ 2,341 $ 3,955  
Granite Point Mortgage Trust Inc. [Member]      
Related Party Transaction [Line Items]      
Purchases of equity securities of related party (in shares) 1,658,008    
Purchases of equity securities of related party $ 30,049    
Equity securities, at fair value 27,423   29,413
Equity securities, unrealized gain (loss) $ (2,630)   $ (641)